# How are perpendicular lines and intersecting lines alike and how are they different?

Some intersecting lines ** are** perpendicular
lines.

Take any old pair of intersecting lines. If the angles at the intersection

happen to be 90 degree angles, then the lines are perpendicular lines.

### How are perpendicular lines different and Alike from intersecting lines?

Perpendicular lines are in shape of (most of the time) a plus sign (+) and intersecting lines speak for themselves: the lines intersect with one another. They are alike becuase they both have a vertex (when two or more lines meet; the center where the two or more lines meet). They may be different becuase a perpendicular line always has four right angles (or more), when intersecting lines can have various types of angles. Or…